I can only attribute if the creator is known. If you read my other posts you will see that I either attribute or link to the original url of source material ...but in this case I was unable to do so. As you say, great work orphaned...

Sociable

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About Me

I've been involved with education for around three decades - I've taught all grades from Prep to final year University. Particular interest in mathematics, literacy and ICT education.
Twitter id = @Nevbar1